How to deal with negative attitudes to E-cigarettes?

Since I started vaping I've had various reactions from both friends and strangers
most have been positive but there have been some negative reactions as well.

I'm happy to say I have managed to convince several people to give vaping a
try and will happily tell people about my experience with vaping and allow them to try my Ego kit if they want to. Some of my friends have ended up going out and buying a kit after they've seen how easily I've given up smoking.

Sadly I've also been told that I'm still smoking through using the E-cigarette or
that I have no idea of how harmful it could be to myself or others around me. I
feel there is a lack of understanding of the true facts due to misleading articles
in the news and very few of these people will believe that nicotine itself is not nearly as harmful as all of the other nasty chemicals in real cigarettes.

The negative attitudes aren't helped by governments who are trying to ban or regulate E-cigarettes or the large pharmaceutical companies who seem to be behind most of the current studies into E-cigarette use.

I usually try to explain a bit more about vaping to anyone who tells me that
vaping is bad, dangerous or should be banned. I try to point out the good
things such as the improvement I've noticed in my health but there's no doubt that in some cases I'm banging my head against a brick wall.

How do you deal with people who are negative towards you using E-cigarettes
do you try to explain the other side of it or just let them think what they like?